Ansatsu Kyoushitsu x reader ~REQUEST: OPEN~

Yandere!Isogai x reader: Missing (you?)

~WARNING: Violence and slight gore~

~Enjoy reading anyways~

____________________________________________________________________________________

A pair of golden eyes watched you closely. They watched your every move. You were discussing with Nagisa what would be the best way to assassinate Koro-sensei. The ikemen's blood boiled and he clenched his fists. His best friend noticed his odd behavior.

"Yo Isogai, are you okay?" The orange-haired male asked. Isogai smiled at him. "I'm fine. Don't worry about me Maehara." He stated kindly. The other male shrugged and walked away to sit on his spot. Isogai kept glaring at you and Nagisa. You turned around, having the urge to know who glared at the two of you. Your (E/C) eyes met Isogai's and you both blushed. You were the first one to look away, so you could continue your conversation with Nagisa. The blue-haired male gave you all the tips and all the notes he had.

"I owe you one, Nagisa-kun!" You said cheerfully. "You really don't (F/N)-chan. It was really nothing." "Fine then. Again, thanks!" And you made your way back to your seat. 'I have to get rid of Nagisa-kun... But that won't be easy. Maybe sleeping gas will work, or a rag with a certain fluid~ Or maybe a syringe and a tranquilizer! That last one will work. I can get one in the nurse's office. Yosh! This lunch I will get the two weapons and after school, Nagisa will come with me~' He thought as he softly chuckled. The lesson soon started and it seemed to flash by with Mach 20. As lunch arrived Isogai excused himself saying that he needed to go to the bathroom. He went to the nurse's office and he got the tranquilizer and the syringe. He placed both of the weapons in the storage room and he went back to class.

"Hey Nagisa, can you help me with some things in the storage room after school?" Isogai asked with his usual ikemen smile on. "Sure." Nagisa responded with a smile. Isogai took the bento out of his bag and started eating his lunch. The lesson soon started.

"Okay everyone, take your seats and get your books out. The lesson is about to start." Koro-sensei announced. Everyone got their books out. Including Karma, but he used it to cover his face while he was asleep. The class went by and soon the end of the day arrived and Isogai went to the storage room with Nagisa.

"So what can I help you with?" Nagisa asked. "Can you move those boxes a bit? I will move these boxes." Isogai said. Nagisa turned around and started to move the boxes more to the sides. Isogai got the syringe and slowly crept up behind Nagisa. The blue-haired boy suspected nothing. "Goodnight, Nagisa-kun." He spoke as he jabbed the tranquilizer into the boys' neck. Nagisa was startled but he soon fell to the ground. Isogai laughed and put the sleeping body into a music case. Isogai walked out and bid his farewell to everyone who was still in the building.

As everyone left the building, Isogai broke in and got the music case which still contained the sleeping body. Isogai arrived at home and he put the music case in the basement. He then made dinner for his family and put his siblings to bed. After he knew that his family was sound asleep, he went to the basement and tied the boy up. He then waited until it was midnight.Nagisa woke up and Isogai started torturing the young boy. Whips were hitting the pale skin, blood gushed out of the newly-made wounds and his skin was starting to get colored with bruises and red marks. After a few hours Isogai decided to stop and get some rest.

~Le next day~

As Isogai arrived at school, he already saw you sitting at your table. You looked absolutely gorgeous. Your soft (H/L) (H/C) hair was perfectly framing your (S/C) face and as usual your (B/T) (A/N: B/T means body type.) looked great in that uniform. He admired every little thing about you. How you always wore a kind smile, how you were innocent and pure, how you would concentrate fully on the lesson and make notes. He loved everything about you, and he wanted everything. He wanted you whole. But he can only have you if everyone was gone. So he started his mission.

Month after month, male students dissapeared. You were worried and scared. The only one left was Isogai. You suspected him, you didn't want to.. But he acted... Suspicious. Your legs were trembling as you stood in front of the classrooms' door. You were afraid Isogai might be gone. You slowly opened the door and you sighed in relief as you saw the black-haired ikemen sitting at his usual spot. You walked towards him and stood next to his desk.

"I-Isogai-kun... C-Can you m-m-meet me a-at the c-cherry b-blossom tree at the back of t-th-the s-school this a-afternoon?" You managed to stutter out. He smiled at your nervous form and nodded. "Sure (F/N)-chan." He spoke with a surprisingly gentle tone. You smiled back at him and you went to the spot next to where Karma was supposed to sit. Tears slowly made their way up to the surface of your (E/C) eyes but you kept them in. All of your male friends disappeared. You were slowly breaking down. You promised yourself you would protect Isogai no matter what.

But you didn't know that he was the cause of the disappearing students. After school you were waiting for him at the cherry blossom tree. You confessed to the ikemen and he gladly accepted your shy confession. You two had a happy and healthy relationship.

Until...

"(F/N)-chan, I have to go to the store for a bit. Will you look after the house until I'm back?" He asked. You nodded and sat down on the couch, eaing your bought (F/S) (A/N: Favorite snack). Isogai left the house and after 30 minutes, you were done with your snacks and decided to explore the house a bit. You found the door to the basement and you tried to open it. But it was locked. You searched for the key and you found it. You went back to the mysterious basement door and opened it. You gulped at the darkness and you took out your phone, turning on the flashlight. You slowly went downstairs and you felt tears well up in your eyes as you saw and smelled what was in the basement.

All the guys who were 'missing' were in there. You spotted corpses and some of them were still alive, but barely. You felt as if you were about to throw up and slowly walked up to them. The ones who were alive were: Chiba, Itona, Maehara and Yoshida. You untied the boys as fast as you could and called 911. You heard the front door open and you raced up the stairs, closing the basement door behind you. You went to the bathroom and flushed the toilet.

"(F/N)-chan? Where are you?" He asked. "I was just on the toilet, Isogai-kun." You said as you walked into the living room. He smiled at you and then hugged you. You hugged back, not wanting to seem suspicious. You walked back and pinned him down on the couch. You smiled at each other and he pulled at your tie so he could kiss you. You cupped his cheeks and kissed back. Soon the police barged in. You parted and held Isogai down.

"How can I help you gentlemen?" Isogai asked and you stepped off of him. "I love you Isogai-kun.. But I'm sorry. What you did is unacceptable." You spoke softly. "Take him guys..." You spoke sadly. They cuffed up Isogai and you lead the rest of them to the basement. As Isogai got taken away, you gave him one last peck on the lips. "I'll visit you.." You spoke and he nodded with dull eyes. Yoshida, Chiba, Itona and Maehara thanked you and they were brought to the hospital.

You visited Isogai twice every week, sometimes bringing him sweets. "Isogai... Why did you do it?" You asked. He looked down and started to speak. "I was afraid you would be taken away from me." He spoke with a rasped voice. "Isogai... I've liked you all along." You spoke with a smile on your face and tears in your eyes. "Don't cry." He said. You leaned your forehead on the glass that seperated the two of you. He also leaned his forehead on it. "I promise that when I get out... I'll do everything to make you happy. I promise." He said. Tears rolled down your cheeks and you nodded.

"I wish those 5 years will be over already."

~END~

(A/N): Isogai's family is all okay. In case you wondered. After Isogai got free you two decided to marry and have a child. You two were 21 when you made those decisions. After 9 months you two got a little baby girl/boy named (Child/Name).